K2S→H2S→SO2→SO3→AL2(SO4)3→Al(OH)3→Al2O3

K2S + 2HCl->2KCl + H2S 2H2S + 3O2 -> 2SO2 + 2H2O 2SO2 + O2 -> 2SO3 3SO3 + Al2O3 -> Al2(SO4)3 Al2(SO4)3 + 6NaOH -> 2Al(OH)3 +3 Na2SO4 2Al(OH)3 -> Al2O3 + 3H2O

K2S+2HCl-->2KCl+H2S↑2H2S+3O2-->2SO2+2H2O (t)2SO2+O2-->2SO3 (t, кат. V2O5)3SO3+Al2O3-->Al2(SO4)3Al2(SO4)3+6NaOH(разб.)-->2Al(OH)3↓+3Na2SO42Al(OH)3-->Al2O3+3H2O (t)